I would use it if the LLM they used were better. It keeps inventing files that don't exist. If I could just provide my GPT-4 API key so it can use GPT-4 I'd be happy.
They use Claude 2 as AI backend with a 100K context window. In my experience Claude is better at programming than GPT-4 because it has a much younger cut-off date and because of the context window to process knowledge.
Halluzination happens with all LLM's.
Highly recommending filing issues on their repo if you have anything reproducible. I've had several bugs I filed get fixed this way.